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Raman Spectroscopy Detects First Signs of Tooth Decay

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David L. Shenkenberg

Dentists commonly use x-rays and metal picks to detect cavities, but Raman spectroscopy could detect tooth decay earlier. With low power and near-IR excitation, it could do so more safely than x-rays and without pain. Recently, researchers discovered that both polarized and nonpolarized Raman spectroscopy can discriminate between healthy teeth and decay. The group included investigators from the Institute for Biodiagnostics of the National Research Council Canada and the University of Manitoba, both in Winnipeg, and from Dalhousie University in Halifax, Nova Scotia, Canada. The initial...Read full article

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    Published: July 2008
    Glossary
    raman spectroscopy
    Raman spectroscopy is a technique used in analytical chemistry and physics to study vibrational, rotational, and other low-frequency modes in a system. Named after the Indian physicist Sir C.V. Raman who discovered the phenomenon in 1928, Raman spectroscopy provides information about molecular vibrations by measuring the inelastic scattering of monochromatic light. Here is a breakdown of the process: Incident light: A monochromatic (single wavelength) light, usually from a laser, is...
    FeaturesMicroscopynear-IR excitationnonpolarizedRaman spectroscopyspectroscopy

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